Instrument for measuring dip and orientation of deep wells



INSTRUMENT FOR MEASURING DIP AND ORIENTATION OF DEEP WELLS Filed Aug. 13, 1951 FiSVZ Fi9.1

March 2, 1954 c o MURATA 2,670,547

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Patented Mar. 2, 1954 UNITED STATES FATENT rarer lchiro' Murata, Tokyo, J apan AnnlicartiumAngust-l3t1951, Serial Na-241 ,6 34:

2. Claims. (01. 33-2055) 1. This invention relates.- to an instrument for measuring dip and orientation of a deep? well boring, and: more-particularly to a mechanical indicating or recording device which records the inclination and direction atarequiredv depth; of

a deep well boring.

The principal object of this invention. is. to provide an instrument. which gives a direct indication of the dip andorientation withoutnecessitating any other additionalequipment.

Another object of. theinvention is to provide an instrument which. facilitates thetakingof a record; of. the dip/and. orientation: on a graduated. plate. or chart.-.

A furtherobject of the invention-is to provide means for. preventing; errors: and:- false indications. resulting from shocle and; vibrationdue to collision. of the hanging. weight.

In heretofore know-n.- well; indicators using a hanging weight and-1 a. scale. disc. provided: with a. permanent-magnet; a complicated automatic camera is provided. in the casing for.- taking; a photograph; oi the indication, cm the scale disc, that is, the relative positions-oi thepneeclle point and the graduation onthe-scale-:whenitheeinstrumentsbecamestationary after. it had been lowered in.- a wel1= tube; and the film. takenout. of: the instrument after it has. been pulled unis developed in order to.- obtaina picture showing the indication. lnisuchia device, thefilm is-notonly deterioratedby theheatzand other causesseaisting'ata depthoii 3000 tolooll-metersrin the deep well. but also. it requires: considerable. time and labour todevelop: a film-soithat: itwas impossible toobtaina desirablesquick; and: direct-indication.

The. above disadvantages can be= entirely cloviated: by the present -invention; inwhich no; use ismadeof; such. means: as an; automatic. camera, the indication-being;obtainedby -purely mechanical means, thereby slowlyfiring a: finely sup"- portedlpermanent; magnet to a: 8831611156 with a defiinite relation soas to facilitate. the reading on the; scale; disc through transparent. plates Another important featuraofi this? invention is that theetrace ofrthe needle point of the hanging weight can be impressed directly on a graduated paper or chart putfion the magnet'disc' without disturbing its finallyrset condition; thereby facilitating the taking of a record of each measurement..

With the above objects View the invention consists of novel details of construction and combination of parts hereinafter fully described and claimed.

Referring to the drawing:

Fig. 1 is a sectional elevation of a recording type instrument embodying this invention;

Fig; .zzis a sectionarside elevation of. the lower part of theinstr-ument shownin Fig. 1;

Fig: 3* isai plan. View: of: the magnet disc;

Figs. 5 is: a partial: side viewof: the camwheel ofthe: watch mechanism in an enlarged scale.-

Now referring to Fig. 1; Hr designates an; outer cylinder having a top cover 2 detachablyscrewed thereto; 4 represents ahanging weight freely supported by a gimbal.-3-- in the top: cover 2 so as1t0 take: always its vertical?- position independent I of the inclined" position: of: 131162011136? cylinder: h. 5 represents. an. inner casing: movalcly fittedl into the. outer" cylinder I" and? normallybiasedatoi the lower position by means of. a; spring; a The casing: 5 has an open top leaving a small inside flange- 5' to support: a. disc; [0 provided-I: with: a small pin 48: projecting: therefrom for: engaging the recess 48! of a scal'etplate or compass chart 49' printed with: the angle of. inclination oniconcentric circles and the direction angle-r around the circumference: The disc in? may be: made of plasticmaterialzormetal such as Duralumin having a; permanent magnet I10." fixed thereto andds freely supported on aneedleaxle: l" to take always a definite: N-Sz dlI'8CfiDIl.-. Axle Isl: is slidably fitted to" the: bearing sleeve i=2." andurged upwardly by a spring I31 and the; bearing: sleeve '32 is slidably fitted inlthe inner tubesd and biased downward: by a spring: [9:

An; automatictim'elifting device id: of. suitable construction. is provided: and includes lifting top. l5; Assshownz inrFigzi2; the device: it? below the lifting? top; l5 comprises a watch mechanism enclosed in a: casing 32;. and'having an: anchor mechanism 313, a. sprocket wheel 34', a series of gear wheels; 35-, a: camwheel $6, a. spring: casing 3 (Fig: 5)' andla-stop.mechanism fiil'. i l-he cam wheel 36: has acircular groovc llill and two'- radial grooves eflzan'dr 40 The-movabletop immormally biased; upward by a spring 41* engages the cam wheel 36 by means of a2 leg dzz and; pin 13 which passes through the: groove 39. Around the circumference. of-itheacam wheel 3'6 isi provi'de'd numericalindicia which can be: seen. through a window-opening l l, .and:the operating'time of 'the watch mechanism may be: regulated: as desired by turning' 'th'e spring axle. with a key'inserted through a .hole- 4'6: provided in. the casing. Duringthe. operation of thewatch mechanism, ifthe pin 43 engages. the" circular part of the groove 39; theztop: 1.6 isheldistationaryr. But whenzth'e radial groove 40, and successively groove Ml, arrive at the position of the pin 43 after a predetermined time limit, the top H5 is pushed out rapidly by spring 4| once and. after some time interval.

20 designates a time limit slow motion mechanism arranged on a frame 2| fixed to the inside of the inner casing above the time controlled lifting device l5. Mechanism 26 comprises a series of gearings 22, a spiral spring 23 which is fixed at one end to the axle 24 and at the other end to the casing 25, and brake blades 26 which are normally held stationary by a stop lever 21. A cam 28 keyed to the axle 24 and arranged to act on the spindle 29 which is supported by a bracket 30 fixed to the frame 2| or inner casing 5, and the top part !4 of the spindle 29 is biased to the lower position by a spring 3!. A hole I! in the outer and inner casings I and 5 provides access to the end of axle 24 for afiixing a key to the latter to wind the spring 23.

The operation of the instrument shown in Figs. 1 and 2 is now described as follows:

The watch mechanism of the time controlled device I5 is adjusted to act after a definite time interval which is necessary for the present instrument to arrive at a pre-determined depth of a deep well and some allowance added thereto, and then the instrument is placed in a protective shell and lowered into a deep well of which the dip and orientation are to be measured. Ar

riving at the predetermined depth, the outer cylinder l stops and takes the angle of repose conforming with the inclination of the well. After the definite time limit as set on the watch mechanism of device l5, the radial groove iii of the cam wheel 36 of the watch mechanism arrives at the position of pin 43, then the top 16 is projected upwards and acts on the rod 4'! to release lever 21 and thus start the time mechanism 20. As the time mechanism runs, the cam 28, acting on the rod 29, lifts up rod 29 and the upper part l4 of rod 29 in turn raises bearing sleeve I 2 slowly until the magnet disc ID engages the top edge 5' of the inner casing 5 and is clamped in such position by the top edge of the sleeve [2' so that the magnet disc H] may be positively clamped. The top H? of the watch mechanism again raises quickly to a higher position when the pin 43 engages the second radial groove 40', and forces up the inner casing 5 as a whole so that the scale plate 49 on the magnet disc collides with the hanging weight 4 and the needle point impresses a trace on the scale plate. Accordingly an exact and positive measurement can be recorded on the scale plate 49 without errors due to inspecting the scale through transparent plates as in some known type, and also without disturbance by shock of collision caused by the hanging weight. It is very convenient in handling and the operation can easily be repeated by replacing the used scale plate 49, so that the working efiiciency may be promoted.

Having thus described my invention what I claim as new and desire to secure by Letters Patent or the United States is:

1. An instrument for measuring dip and orientation of a deep well comprising an outer cylinder, a weight having a needle point, gimbal means hanging said weight from the top of said outer cylinder, an open topped inner casing slidably fitted in said outer cylinder, spring means acting between said cylinder and inner casing biasing said inner casing to a lower position, said inner casing having an engaging inner edge at the open top thereof, a bearing sleeve having an upwardly projecting top supporting edge slidably fitted in said inner casing, second spring means acting between said inner casing and bearing sleeve biasing said bearing sleeve to a lower position in said inner casing, a magnet disc adapted to receive a graduated scale plate, said disc having a peripheral edge adapted to be clamped between the inner edge at the top of said inner casing and the top edge of said bearing sleeve, a vertical needle axle resiliently fitted to said bearing sleeve and which freely supports said magnet disc, an automatic time limit slow lifting device secured to the inside of said inner casing arranged when operated to raise said bearing sleeve against the biasing action of said second spring means thereby raising and clamping said magnet disc at the raised position between the inner edge at the top of said inner casing and the top edge of said bearing sleeve, an automatic time limit two stage operating device arranged to start said time limit slow lifting device at the first stage and to raise said inner casing as a whole at the second stage thereby to cause said scale plate to be struck by the needle point of said hanging weight.

2. An instrument for measuring dip and orientation of a deep well as defined in claim 1 wherein said automatic time limit slow lifting device comprises a speed reduction gearing train, a spiral spring connected with said gearing train for driving the same, a cam rotated by said gearing train and which is coupled to said bearing sleeve for raising the same, a stop lever engageable with said gearing train for holding said gearing train stationary and a starting lever engageable with said stop lever for disengaging the latter from said gearing train; and said automatic time limit two stage operating device comprises a top, spring means biasing said top in an upward direction, a watch gear train mechanism of which the last gear is provided with a circular groove connecting with two stage radial grooves, and a pin secured to a leg of the top of said two stage operating device engaging in said circular groove for holding said top in a lowered position against the biasing action of the said spring means therefor, said last gear being rotated in accordance with time to transfer said pin from said circular groove to said radial grooves in sequence thereby releasing said leg and top for movement in an upward direction in two stages, said top in its first stage of movement engaging the said starting lever of said automatic time limit slow lifting device to thereby effect a lifting of said magnet disc slowly and a clamping of the same in a stable condition, and the second stage of movement of said top bringing the latter into engagement with said inner casing as a whole to cause said inner casing to lift and cause a trace of the needle point of said hanging weight to be impressed upon the scale plate on said magnet disc.

ICHIRO MURA'I'A.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,057,787 Monroe Oct. 20, 1936 2,089,153 Monroe Aug. 3, 1937 

